75681887 has 2 divisors, whose sum is σ = 75681888. Its totient is φ = 75681886.

The previous prime is 75681877. The next prime is 75681911. The reversal of 75681887 is 78818657.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 75681887 - 2⁴ = 75681871 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75681817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37840943 + 37840944.

It is an arithmetic number, because the mean of its divisors is an integer number (37840944).

Almost surely, 2^75681887 is an apocalyptic number.

75681887 is a deficient number, since it is larger than the sum of its proper divisors (1).

75681887 is an equidigital number, since it uses as much as digits as its factorization.

75681887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 752640, while the sum is 50.

The square root of 75681887 is about 8699.5337231371. The cubic root of 75681887 is about 422.9905360717.

The spelling of 75681887 in words is "seventy-five million, six hundred eighty-one thousand, eight hundred eighty-seven".